Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 02 Jun 2017 My Price 10.00

fan blades on commercial jet engines

Engineering: Jet Engines The fan blades on commercial jet engines must be replaced when wear on these parts indicates too much variability to pass inspection. If a single fan blade broke during operation, it could severely endanger a flight. A large engine contains thousands of fan blades, and safety regulations require that variability measurements on the population of all blades not exceed σ2= 0.18 mm2. An engine inspector took a random sample of 61 fan bladesfrom an engine. She measured each blade and found a sample variance of 0.27 mm2. Using a 0.01 level of significance, is the inspector justified in claiming that all the engine fan blades must be replaced? Find a 90% confidence interval for the population standard deviation.

Answers

Maurice Tutor
(5)
Status NEW Posted 02 Jun 2017 09:06 PM My Price 10.00

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